Final answer:
Immigrants from Brittolia identifying with red rice as a symbol of their culture and identity falls under the subject of Cultural Identities in Social Studies.
Step-by-step explanation:
The example of immigrants from Brittolia identifying with red rice as a symbol of their culture and identity falls under the subject of Cultural Identities in Social Studies. Food plays a central role in cultural identity, with certain foods considered critical to maintaining cultural identity. In this case, red rice is a symbolic representation of the culture and identity of immigrants from Brittolia, representing their unique heritage and traditions.